Planning a gaming setup in limited space starts with picking a desk about 100...

https://lanesniceblog.scriblorax.com/posts/i-bought-a-bigger-desk-and-it-still-feels-uncomfortable-why

Planning a gaming setup in limited space starts with picking a desk about 100 to 120 centimetres wide to fit your gear without crowding. Use a monitor arm to free up desktop space and create more room for your keyboard and mouse